FTP client and server using Scapy (IPv6 and IPv4, python3)

Requirements

• Python3(3.6) with Scapy
• netifaces
• Update iptable rules

  bash update_iptables.sh
  

This makes use of TCP connection class designed for implementing a TCP connection using Scapy module.
Source: https://github.com/karthikbhata97/ScapyTCP

Client

Usage:

sudo python3.6 ipv6/client.py client.py [-h] --iface IFACE -i HOST -p PORT
sudo python3.6 ipv4_python3/client.py client.py [-h] --iface IFACE -i HOST -p PORT

eg: sudo python3.6 client.py --iface wlp3s0 -i fe80::a00:27ff:fe1e:e615 -p 21 eg: sudo python3.6 client.py --iface wlp3s0 -i 192.168.0.7 -p 21

• Help

python3.6 ipv6/client.py -h
python3.6 ipv4_python3/client.py -h

• Client will connect to server based on given interface.
• Session is logged in based on the credentials.
• Supplied commands will be sent to server and response is shown.

Implementation

Class FTPClient

• Takes the commands as input and sends them over TCP/IPv6

Class TCP_IPv6

• Implements TCP/IPv6 stacks which can be made use by any of upper layer protocols.

Class TCP_IPv6_Connection

• Listener for the TCP_IPv6 class, reads packets and acknowledges them.

Server

Usage:

sudo ipv6/server.py [-h] --iface IFACE -p PORT
sudo ipv4_python3/server.py [-h] --iface IFACE -p PORT

Implementation

Class FTPServer

• Main thread which assigns a new thread of Server connection for each new connection.

Class FTP_Server_Conn

• Implements FTP control connection.

Class FTP_Data_Conn

• Implements FTP data conneciton.

FTP client using Scapy (IPv4, python2)

Requirements

• Scapy on Python2.7
• Update iptables to prevent sending RST

  bash update_iptables.sh
  

Usage:

sudo python2.7 client/client.py [-h] -u USER -l PASSWD -i IPADDR -p PORT [-m MULTIPLE] [-c COMMAND_FILE]

optional arguments:
  -h, --help            show this help message and exit

  -u USER, --user USER  
  Username for FTP login

  -l PASSWD, --passwd PASSWD
  Password for FTP login

  -i IPADDR, --ipaddr IPADDR
  FTP server IP address

  -p PORT, --port PORT
  FTP server port number

  -m MULTIPLE, --multiple MULTIPLE
  Open multiple connections to FTP server

  -c COMMAND_FILE, --command_file COMMAND_FILE
  Run commands from given file for multiple connections.
  Each line has n(number of multiple connections) comma seperated FTP commands.

eg: sudo python2.7 client/client.py -u test -l test -i 172.16.1.125 -p 21

• Initially, the client will do a TCP handshake with server on given PORT.

• The username and password is shared to log in to this session

• Commands can then be executed in the interactive terminal

• Help

python2.7 client/client.py -h

Implementation

Class FTPClient (ftp_client.py)

• Takes input from user and sends it to the specified server.

Class FTPListener (ftp_listener.py)

• For a given connection, it sniffs packets and acknowledges them accordingly as well as stores data recieved in them.

Class FTPPassive (ftp_passive.py)

• When command brings up passive mode, it's object is used to communicate with server.

FTP server using Scapy (IPv4, python2)

Requirements

• Scapy on Python2.7
• Update iptables to prevent sending RST

  bash update_iptables.sh
  

Usage:

sudo python2.7 server/server.py [-h] [-p PORT] 

eg: sudo python2.7 server/server.py -p 31337

• Server will be listening on given port.

• Login credentials would be taken.

• Commands can then be executed supplied from the client.

• Help

python2.7 server/server.py -h

Implementation

Class FTPServer (ftp_server.py)

• Creates new connection for each client

Class FTPServerConnectiton (ftp_server_conn.py)

• Runs commands supplied by the client

Class FTPListener (ftp_listener.py)

• For a given connection, it sniffs packets and acknowledges them accordingly as well as passes commands to the server connection.

Class FTPPassiveServer (ftp_passive_server.py)

• For passive mode commands.